optical crown glass Meaning in Bengali

Noun:

অপটিক্যাল কাচবিশেষ,

optical device
optical fiber
optical fibre
optical fusion
optical glass
optical illusion
optical prism
optical pyrometer
optical telescope
optimisms
optimizers
optionals
optionee
optioning
or circuit

is desired, the only choices for common lens optical material are optical crown glass and CR-39.

lead(II) oxide in the production of certain kinds of glass such as optical crown glass.

visual; optic; ocular;

invisible; effector;